215111345 has 8 divisors (see below), whose sum is σ = 262509120. Its totient is φ = 169172080.

The previous prime is 215111291. The next prime is 215111383. The reversal of 215111345 is 543111512.

215111345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215111345 - 2⁸ = 215111089 is a prime.

It is a super-3 number, since 3×215111345³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215111345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364301 + ... + 364890.

It is an arithmetic number, because the mean of its divisors is an integer number (32813640).

Almost surely, 2^215111345 is an apocalyptic number.

It is an amenable number.

215111345 is a deficient number, since it is larger than the sum of its proper divisors (47397775).

215111345 is an equidigital number, since it uses as much as digits as its factorization.

215111345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729255.

The product of its digits is 600, while the sum is 23.

The square root of 215111345 is about 14666.6746401493. The cubic root of 215111345 is about 599.1760402983.

Adding to 215111345 its reverse (543111512), we get a palindrome (758222857).

The spelling of 215111345 in words is "two hundred fifteen million, one hundred eleven thousand, three hundred forty-five".